I went in the other day because my power supply died, and while i was there i asked about the crack in my macbooks case. Its a thin crack that goes from just under the indentation for the magnetic latch to about three or four inches to the left. Apple "genius" told me it wouldnt be covered, unless the keyboard surface itself were cracked. Its such bullshit, my macbook is always in a padded case, but i carry it around everyday for school and i use it a ton. I just dont think the plastic is strong enough for heavy usage.